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Keeb kwm, kev faib cov ntawv, pawg thawj coj saib, thiab cov duab los qhia tau ua raws li kev sau ntawv. Dawb cardboard thiab coated board (feem ntau hu ua "copper card paper") yog ob qho khoom siv dav hauv kev luam ntawv. Txawm hais tias sib qhia lo lus "daim npav," lawv txawv heev hauv daim ntawv thov, kev tsim khoom, thiab cov tsos. Tshooj lus no tshuaj xyuas qhov sib txawv no los ntawm macroscopic thiab microscopic foundations kom paub meej lawv cov yam ntxwv thiab kev siv cov xwm txheej.
1. Kev ua haujlwm txawv
Cov ntawv dawb yog cov ntawv tuab, cov ntawv tsis sib xws nrog lub hauv paus hnyav thiab cov kev xav tau nruj rau cov xim dawb: Qib A Ntau dua lossis sib npaug li 92%, Qib B Ntau dua lossis sib npaug li 87%, thiab Qib C Ntau dua lossis sib npaug li 82%. Thaum whiteness tshaj 90%, qhov saum npoo zoo nkaus li ci, txawm glossy. Nws yog feem ntau ua hauj lwm hauv luam ntawv lag luam phaib, ntawv pov thawj, caw, npog, daim ntawv qhia hnub, thiab xa ntawv phaib.
Coated board nta siab smoothness, gloss, txheej txheej, thiab ceev tus number case nqus. Cov txheej txheem nws tus kheej muaj qhov whiteness ntau dua 90%, ua rau nws tsim nyog rau siab -fidelity xim luam tawm. Cov ntawv thov suav nrog cov npav lag luam zoo tshaj plaws, cov ntawv tshaj tawm, cov duab albums, cov cim npe khaub ncaws, thiab ntim khoom zoo nkauj.
2. Cov txheej txheem tsim khoom sib txawv
Dawb cardboard hais txog thickness, txhav, tawg tsis kam, thiab nto smoothness (tsis suav embossed variants). Qhov saum npoo yuav tsum tsis muaj qhov tsis xws luag xws li streaks lossis me ntsis, tsis muaj warping lossis deformation. Ua ntej xyoo 1992, feem ntau ntawm cov ntawv dawb siv nyob rau hauv txawv teb chaws - cov tuam txhab lag luam thiab cov tsev so hauv Suav teb raug xa tawm. Qhov tshwm sim ntawm Ningbo Zhonghua Ntawv Kev Lag Luam tau hloov qhov kev hloov pauv no los ntawm kev qhia cov khoom siv hauv tsev uas siv cov tshuaj bleached ntoo pulp, cov cuab yeej siv siab heev, thiab cov txheej txheem niaj hnub. Cov khoom siv hauv tsev no phim cov khoom lag luam zoo ntawm cov nqi qis dua thiab tam sim no ua tus thawj coj hauv khw.
Coated board ua tiav nws txoj kev ua tiav los ntawm txheej txheej ua raws li supercalendering. Cov txheej txheej yog sib npaug, ua kom muaj xim dawb, ua kom pom tseeb. Coated boards raug cais raws li ib leeg -coated lossis multi-coated; lub qub yog feem ntau hu ua yooj yim li coated ntawv.
3. Kev pom thiab cov qauv sib txawv
Vim muaj kev sib txawv ntawm kev ua haujlwm, qhov chaw ntawm cov ntawv dawb thiab coated board nthuav tawm cov yam ntxwv sib txawv. Ob sab ntawm coated board yog printable, featuring siab smoothness, flatness, thiab gloss. Scanning electron microscopy (SEM, 1000 × magnification) qhia cov qauv zoo sib xws ntawm ob sab, nrog qhov sib txawv me me.
Nyob rau hauv sib piv, dawb cardboard muaj ib tug bimodal nto: ib sab yog du thiab reflective, piv rau coated board, thaum lub rov qab zoo li daim ntawv luam-matte thiab tsis yog-reflective. SEM tsom xam qhia tau hais tias txawm hais tias cov particle morphology ntawm tus du zoo li cov coated board, sab rov qab qhia heterogeneous particle tis thiab pronounced roughness.
Hauv cov ntsiab lus, cov duab los qhia dawb thiab coated board pab cov lag luam sib txawv vim lawv cov qauv thiab kev ua haujlwm sib txawv. Dawb cardboard tseem tseem nyob hauv pawg thawj coj. Nrog rau kev loj hlob ntawm ib puag ncig kev paub thiab kev tswj hwm kev hloov pauv-xws li Tuam Tshoj txoj kev hloov pauv los ntawm "kev txwv cov yas" mus rau tag nrho "txheej txheem yas" pib txij Lub Ib Hlis 1, 2021-ib zaug- siv cov yas xws li straws, tais diav, thiab cov khoom sib tov tau raug txiav tawm. Los ntawm 2040, cov khoom siv yas pov tseg tau xav tias yuav ploj mus los ntawm cov neeg siv khoom lag luam. Qhov kev hloov pauv no, ua ke nrog nce eco-kev nco qab thiab kev hloov kho dua tshiab, ua rau kev xav tau kom ruaj khov, tus nqi{11}} cov ntaub ntawv zoo hauv cov neeg siv khoom kawg. Kev hloov ntawm daim ntawv rau cov yas tau dhau los ua ib qho kev hloov tsis tau, qhib txoj hauv kev loj hlob tshiab rau kev lag luam ntawv.
